acpi_video, 5.3-RELEASE, ThinkPad X31?

[Jochen Gensch]

Brad Karp wrote:

> Are there known problems with acpi_video attaching on ThinkPads of some 
> models? How about known fixes?

I doesn't work on my Thinkpad A30p, either. I have found no way to turn 
off the screen completely while in supsend. However I have only tried 2 
of the 3 sysctls mentioned by Kevin...

I remember it all working under 4.x with APM. I guess I will give that a 
try again. Despite these problems, there are some Thinkpads, which are 
know to work with acpi. One trick is disabling dri in the kernel / 
X-Config. This prevents the system from loading the radeon.ko module, 
that is likely to cause this problem whith the background light. Didn't 
work here, maybe you are lucky...

Cheers, Jochen